2007 GMC Yukon slow start
November 5th, 2015, 6:43 AM
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2007 GMC Yukon slow start
Needing some help I've got a 2007gmc Yukon 5.3l. It doesn't start right away it cranks and cranks then it starts. It does have a check engine light on with a po121 fault. I was told it was a tps sensor and installed a new sensor but it's still doing it.
